<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>商品列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图区域 -->
    <el-card>
      <!-- 搜索和添加区域 -->
       <div style="margin-top: 15px;">
          <el-row :gutter="20">
            <el-col :span="8">
              <el-input placeholder="请输入内容" v-model="queryInfo.query" clearable @clear="getGoodsList">
                <el-button slot="append" icon="el-icon-search" @click="getGoodsList"></el-button>
              </el-input>
            </el-col>
            <el-col :span="4">
              <el-button type="primary" @click="goAddpage">添加商品</el-button>
            </el-col>
          </el-row>
        </div>
        <!-- 用户列表区域 -->
        <el-table :data="goodsList" border stripe>
          <el-table-column label="#" type="index"></el-table-column>
          <el-table-column label="商品名称" prop="goods_name"></el-table-column>
          <el-table-column label="商品价格（元）" prop="goods_price" width="110px"></el-table-column>
          <el-table-column label="商品重量" prop="goods_weight" width="90px"></el-table-column>
          <el-table-column label="创建时间" prop="add_time" width="140px">
            <template slot-scope="scope">
              {{scope.row.add_time | dateFormate}}
            </template>
          </el-table-column>
          <el-table-column label="操作" width="130px">
            <template slot-scope="scope">
              <!-- 修改按钮 -->
              <el-button type="primary" icon="el-icon-edit" size="mini" @click="showDialog(scope.row.goods_id)"></el-button>
              <!-- 删除按钮 -->
              <el-button type="danger" icon="el-icon-delete" size="mini" @click="removeGoodsById(scope.row.goods_id)"></el-button>
            </template>
          </el-table-column>
        </el-table>
        <!-- 分页区域 -->
        <el-pagination
          @size-change="handleSizeChange"
          @current-change="handleCurrentChange"
          :current-page="queryInfo.pagenum"
          :page-sizes="[5, 10, 20, 50]"
          :page-size="queryInfo.pagesize"
          layout="total, sizes, prev, pager, next, jumper"
          :total="total" background>
        </el-pagination>
    </el-card>
    <!-- 编辑商品对话框 -->
    <el-dialog
      title="编辑商品信息"
      :visible.sync="updateDialogVisible"
      width="50%"
      @close="updateDialogClose">
      <!-- 内容主体区域 -->
      <el-form
      :model="updateForm"
      :rules="updateFormRules"
      ref="updateFormRef"
      label-width="120px">
        <el-form-item label="商品名称" prop="goods_name">
          <el-input v-model="updateForm.goods_name"></el-input>
        </el-form-item>
        <el-form-item label="商品价格(元)" prop="goods_price">
          <el-input v-model="updateForm.goods_price" type="number"></el-input>
        </el-form-item>
        <el-form-item label="商品重量" prop="goods_weight">
          <el-input v-model="updateForm.goods_weight" type="number"></el-input>
        </el-form-item>
      </el-form>
      <!-- 底部区域 -->
      <span slot="footer" class="dialog-footer">
        <el-button @click="updateDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="updateCate">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data () {
    return {
      // 商品列表
      goodsList: [],
      // 商品总数
      total: 0,
      // 查询参数对象
      queryInfo: {
        query: '',
        // 当前的页数
        pagenum: 1,
        pagesize: 5
      },
      // 控制编辑对话框的显示和隐藏
      updateDialogVisible: false,
      // 编辑对话框商品数据
      updateForm: {},
      // 编辑对话框商品数据的验证规则
      updateFormRules: {
        goods_name: [
          { required: true, message: '请输入商品名称', trigger: 'blur' }
        ],
        goods_price: [
          { required: true, message: '请输入商品价格', trigger: 'blur' }
        ],
        goods_weight: [
          { required: true, message: '请输入商品重量', trigger: 'blur' }
        ]
      }
    }
  },
  created () {
    this.getGoodsList()
  },
  methods: {
    // 商品列表获取
    async getGoodsList () {
      const { data: res } = await this.$http.get('goods', { params: this.queryInfo })
      if (res.meta.status !== 200) {
        return this.$message.error('获取商品列表失败')
      }
      console.log(res.data.goods)
      this.goodsList = res.data.goods
      this.total = res.data.total
    },
    // 监听pagesize改变
    handleSizeChange (newSize) {
      this.queryInfo.pagesize = newSize
      this.getGoodsList()
      console.log(newSize)
    },
    // 监听页码值改变
    handleCurrentChange (newPage) {
      console.log(newPage)
      this.queryInfo.pagenum = newPage
      this.getGoodsList()
    },
    // 根据id删除对应商品按钮
    async removeGoodsById (id) {
      // 弹框询问用户是否删除数据
      const confirmResult = await this.$confirm('此操作将永久删除该商品, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch((err) => err)
      // console.log(confirmResult)
      if (confirmResult !== 'confirm') {
        return this.$message.info('已经取消了删除')
      }
      const { data: res } = await this.$http.delete('goods/' + id)
      if (res.meta.status !== 200) {
        return this.$message.error('删除商品失败!')
      }
      this.$message.success('删除商品成功!')
      this.getGoodsList()
    },
    goAddpage () {
      this.$router.push('/goods/add')
    },
    // 监听编辑商品对话框的关闭事件
    updateDialogClose () {
      this.$refs.updateFormRef.resetFields()
    },
    // 展示编辑商品对话框
    async showDialog (id) {
      const { data: res } = await this.$http.get('goods/' + id)
      if (res.meta.status !== 200) {
        return this.$message.error('获取商品数据失败')
      }
      this.updateForm = res.data
      this.updateDialogVisible = true
    },
    updateCate () {
      this.$refs.updateFormRef.validate(async valid => {
        if (!valid) return
        const { data: res } = await this.$http.put('goods/' + this.updateForm.goods_id, this.updateForm)
        if (res.meta.status !== 200) {
          return this.$message.error('更新商品失败')
        }
        this.$message.success('更新商品成功')
        this.updateDialogVisible = false
        this.getGoodsList()
      })
    }
  }
}
</script>

<style lang="less" scoped>

</style>
